View (including non-mounted) hard disk usage fdisk-lView disk mounted partition usage df-h[[Email protected]/]# df-hFilesystem Size used Avail use% mounted on/DEV/XVDA1 20G 5.8G 13G 31%/Tmpfs 16G 0 16G 0%/dev/shmThe 1th column of the output list of the DF command in Linux is the pathname of the device file that represents the file system (typically the partition on the hard disk), and the 2nd column gives t
install 64-bit over 4G, it will be better to install 32-bitTo see if the system is 32-bit or 64-bit use command uname-a if the display has x86_64 is a 64-bit system, and the display i386,i586 or i686 is a 32-bit system.
2. What is the role of the swap partition? How do I determine the size of a swap partition?The swap partition, which is the virtual memory under Windows, is primarily used when the system is out of memory, or when it is running out of time, and the older data inside the me
110G of memory available, but is there really so much? We can manually trigger a memory recovery to see how much memory we can reclaim now:[[emailprotected] ~]# echo 3 > /proc/sys/vm/drop_caches[[emailprotected] ~]# free -g total used free shared buffers cachedMem: 126 43 82 0 0 29-/+ buffers/cache: 14 111Swap: 2 0 2As you can see, the space occupied by cached is not completely released as we imagined, where 13G of space is still occ
the performance of the CPU and GPU under different systems. Can see the obvious difference, although the Mnist dataset is very simple, believe that the complex data set, the difference will be greater, UBUNTU+GPU is the only choice.Test Platform 1 : I7-4770K/16G/GTX 770/cuda 6.5MNIST Windows8.1 on CPU : 620sMNIST Windows8.1 on GPU : 190sMNIST Ubuntu 14.04 on CPU : 270sMNIST Ubuntu 14.04 on GPU : 160sMNIST Ubuntu 14.04 on Gpuwith CuDNN : 101cifar10_fu
VPS Hosting providers at home and abroad are mostly based on Xen, OpenVZ, KVM, Hyper-V, VMware five virtualization technologies.One, Xen official website: http://xen.org/Developed by the University of Cambridge, Xen is a hardware-based, fully segmented, resource-only resource that can be allocated on a physical basis, making it difficult to sell over. Can be divided into XEN-PV (semi-virtualized), and XEN-HVM (full virtualization).Xen is not oversold memory and hard disk, when the parent server
see that for the four RAID levels commonly used, MDADM can support ②mdadm to create raid based on multiple hard disks, partitions, and logical volumes. For a hardware-implemented raid, it can only be based on multiple hard drives. ③ created a good software RAID corresponding to/dev/mdn,n represents the raid, such as the first raid corresponding/dev/md0 created, the second created raid corresponds to/DEV/MD1, Of course, it's a name you can take. ④raid information is stored in the/proc/mdstat fil
the extended partition cannot be formatted until the partition can be formatted as the primary partition and logical partition. The SATA hard disk logical partition from the 5-15,ide hard drive logical partition from 5-63.1.2 Viewing mounted devicesLinux partitions represent cocoa-mounted devices that can mount the appropriate file system (directory) on each partition[[email protected] ~]$ df-h [file or directory]Filesystem Size used Avail use% mounted on/dev/sda3
Tags: sharepointIn this section we continue to configure the DB layer, such as the Red Place.650) this.width=650; "title=" clip_image002 "style=" border-right-width:0px;background-image:none; border-bottom-width:0px;padding-top:0px;padding-left:0px;margin:0px;padding-right:0px;border-top-width:0px; " Border= "0" alt= "clip_image002" src= "Http://s3.51cto.com/wyfs02/M00/6A/A7/wKiom1UrhRnx8NN0AAEsK0kFnfM368.jpg" Width= "557" height= "455"/>
Server
Host Name
Memory
Ip
.
We use two versions of mobile phones, W-mode with TD, come over a few days to find TD's mobile phone faster than W, and TD 28 seconds to get up, but W but to 34 seconds, asked the driver of the colleague, W and TD and no difference, so in addition to the modem is not the same, the other is the same. Looking for a day, still no result. From the log, it's only slow, that's slower, only in the process of scanning the package, the w+gsm takes about 6 seconds, and td+gsm only takes about 3 seconds
;b. High data security requirements but no data read and write requirements can be made raid1;c. High read requirements, and write operation is not required, but to ensure data security, you can make the disk RAID5; D. High requirements for reading and writing, and require high data security, you can make the disk raid0+1; The system is optimized at the disk level by making the disks different RAID levels with different requirements.Memory plane: When the memory is small (physical memory is less
PC configuration: 500G mechanical HDD +16g NGFF ssd+8g Physical MemoryBefore installing Ubuntu16.04, the default installed into the NGFF SSD,/and the swap partition is only 16G, so delete the swap partition, found that the boot speed is extremely slow, even if the swappiness is set to 0 still, so need to re-partition a swap on the mechanical hard drive.Note that since the MBR partition system can only have
can be usedDFThis commandSpecific to ManDFTake a closer lookInstance[Email protected] mnt]#DF-thFile system type capacity used% mount point available/dev/sda7 ext4 25G 8.1G 16G 35%/Tmpfs tmpfs 754M 260K 754M 1%/DEV/SHM/dev/sda9 ext4 42G 3.0G 37G 8%/Home/DEV/SDB1 ext4 30G 44M 28G 1%/mnt/sdb1/DEV/SDB5 ext4 40G 48M 38G 1%/MNT/SDB5/DEV/SDB6 ext4 4.5G 9.1M 4.3G 1%/MNT/SDB6[Email protected] mnt]#DF-TKFile system type 1k-block used available% mount point/dev
Php-ini OptimizationVi/etc/php.iniOpen PHP Safe Mode, control PHP execute dangerous function, default is off, change to OnSql.safe_mode = OffClose PHP header information, hide version number, default is on, this is offexpose_php = OnError message Output controlDisplay_error = Offerror_reporting = e_warning E_errorLog error logs to the background for easy traceabilityLog_errors = OnError_log =/var/log/php_error.logMaximum memory per script timeMemory_limit = 128MUpload file maximum license, defa
The first materials needed are: win7, rhel7 ISO mirrors and EASYBCD
The disk is then divided into 3 partitions, the volume label is: I (RHEL7), J (GEN) and K (SWAP) to note that the three partitions are FAT32 format.
NTFS Linux is not recognized. I divided the size is i:19.5g, j:43g and K (16G because the author's physical memory is 8G so divided 16G)
And if the direct use of Win7 system, more than 32G wil
198M 13M 175M 7%/boot
Tmpfs 16G 0 16G 0%/dev/shm
[ROOT@JLJCDB1/]#
Then try to create a file under the/u01 directory to try and get the same error:
[ROOT@JLJCDB1/]# mkdir/u01/a
mkdir: Unable to create directory "/u01/a": Read-only file system
[ROOT@JLJCDB1/]#
View with mount command:
[ROOT@JLJCDB1 ~]# Mount
/dev/mapper/volgroup00-logvol00 on/type ext3 (rw)
Proc On/proc type proc (rw)
Sysfs On/sys type SYSFS
.rpm:header V3 DSA signature:nokey, key ID 37017186 error: Failed DEPENDENCIES:GCC = 4.1.2-52.el5 is needed by gcc-c++-4.1.2-52.el5.x86_64 Libstdc++-devel = 4.1.2-52.el5 is needed By Gcc-c++-4.1.2-52.el5.x86_64--Start by configuring the local source yum to install from a mirrored disc--View the file system, which is not mounted at this time cdrom [Root@sunny ~]# df-h filesystem Size Used Avail use% mounted on/dev/mapper/volgroup00-logvol00 16G 6.1G 8.
Equals () and = = are used in Java programming or in the actual availability of the system, but there is a real difference between them. Do not take for granted that equals () and = = function is the same, the following step-by-step to explain the difference between the two.
Phone.javaNew phone class, with two private member variables, price and memory, initialized in the constructor.
Package testpackage;
public class Phone {
private float price;//price
private int memory;//memory publ
What is SKU
Wikipedia , the smallest inventory unit (keeping), is sometimes called items as a SKU in a chain retail store, defined as the smallest available unit for holding inventory control, such asFor example: the iphone has specifications: Color "red, gold, black", Memory Size "32g, 64g, 128g" Red +32g is a SKU, of course, can also be divided into a more detailed
background data is as follows: (table 1)
Color
Memory
Screen Size
Stock
Red-A1
16G actual size only 4G? Believe it or not, someone has been cheated, and here's how to fix "16G" back to true capacity 4G.
First, to detect a U disk chip. Chip genius! with tools
Device name: [F:]usb Mass Storage Device (USB2.0 Flash Disk USB Device)
PnP Device Id:vid = 1221 PID = 3234
Device Serial Number: 1000000000000e7e
Device Version: 2.20
Device type: Standard USB device-USB2.0 high speed
Chip
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